In addition to the subway shutdown in new york city tonight, air travel all along the east coast shutting down. So far, more than 6,000 flights have been canceled. Here's abc's lisa stark on that tonight. Reporter: At new york's LaGUARDIA AIRPORT, A MADHOUSE Today, as travelers scrambled to get out before the storm comes in. We're trying to get back to raleigh, north carolina, and we're stuck. We're basically almost havi nervous breakdowns. Reporter: The airlines are taking no chances, starting to cancel flights tonight, from washington, d.C. Northward. And on monday, united, delta, southwest, american, jet blue and us airways all announcing they will be closed for business on the east coast. A massive shutdown that will ripple nationwide. When there are flight cancellations in major hub cities like new york, like philadelphia, like washington, d.C., That affects travelers all over the country. Reporter: Airlines will remove planes from airports in the hurricane's path and hope they can fly back in on tuesday. Train travel, too, coming to a standstill. Amtrak canceling trains north of new york tonight and virtually all east coast service on monday. Now, we're told that folks are spending hours trying to get through to the airlines. The best advice is to go online, even tweet to try to reach your carrier. Once this major storm passes, the airlines will try to get flights back up in the air, but it will take a good three to four days after that for this all to unravel. David? Mess been the storm arrives. Lisa stark in washington, thank you.

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